DarkCide has a three part guide on emulators. While I don't necessarily know for sure the answer is in there, did you look? Look in this section...

Edit: of course, as a forwarder this would make it SD card-dependent. No SD card with the rest of the data would also net you back to a restart @ the Wii Menu.

What do you mean sd card dependant? I have read darkcide's emulator guide and use all of them, but I have yet to find a wii64 or a wiisx forwarder that works (although I haven't put much time in doing so, or making my own, for that matter). I ask about sd card dependant because I don't use an sd card, just a hdd and all of my forwarders (except those 2) work fine.